69 
CHAMA recurvata. 
TAB, XXVI.—Fig. 1. 
Spec. Cuar. Deep valve conical, curved; beak 
subinvolute. 
Tue hollow valve is a roundish deep shell, the surface is 
smooth, and the beak turned to one side. Hinge indistinct. 
I have not met with the other valve, but I suppose it to be 
flatter. ; 
This also is composed of Silex, and is impregnated with 
a coarse ochraceous oxide of Iron. It is from Halldown, 
near Exeter, by favour of T. J. L. Baker, Esq. 
CHAMA conica. 
“TAB. XXVI.—Fig. 3. 
Spec. Cuar. Oblong, curved; larger valve deep, 
with a blunt conical beak, and a small wing ; 
lesser valve oval, flat, with a crenated margin 
and wing. 
EEE 
Dexr valve much larger than the other, about an inch 
long, and three-fourths wide. The hinge is peculiar, 
somewhat resembling a ball’ and_ socket. 
{9s;a Vf 
, fie “Pe 
d 
